Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation

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	Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation
	Shi Yan 1; Liu Shimeng 2; Hu Changqing 2; Zhang Yuzhu 2
刊名	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
	2015
卷号	22 期号:2 页码:128-134
关键词	BASIC OXYGEN STEEL IRON-OXIDE PELLETS HIGH-TEMPERATURE FLUXED PELLETS CO2 SLUDGE SLAG ferrous dust microstructure CaO conversion rate carbonated pellet green pellet
ISSN号	1006-706X
其他题名	Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation
英文摘要	The carbonation and microstructure characteristics of pellets containing ferrous dusts were investigated during carbonation consolidation at different reaction temperatures and CO2 partial pressures. The results indicated that green pellets had loose and network supporting structure with initial strength. and large cracks and pores existed in the pellets. The carbonation reaction was controlled by interfacial chemical reaction at the initial fast stage, which limited diffusion and thus caused the reaction rate to decrease. With increasing reaction temperature and CO2 partial pressure, the conversion rates of CaO and the number of microcrystalline CaCO3 particles increased, and the volume expansion of CaC2O3 led to a decrease in the open porosity. average pore size and specific surface area of the pellets. Micro-pores were occluded, and the number of smaller pores (diameter less than 50 nm) increased, thereby resulting in the more compact and uniform structure of carbonated pellets. Simultaneously, the dense structure prevented CO2 diffusion into the product layer. affecting the increase in carbonation conversion rate.
资助项目	[National Natural Science Foundation of China] ; [Natural Science Foundation of Hebei Province of China]
语种	英语
CSCD记录号	CSCD:5370021
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/150025]
专题	金属研究所_中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.Hebei United University, Hebei Key Lab Modern Met Technol, Tangshan 063009, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Shi Yan,Liu Shimeng,Hu Changqing,et al. Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2015,22(2):128-134.
APA	Shi Yan,Liu Shimeng,Hu Changqing,&Zhang Yuzhu.(2015).Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,22(2),128-134.
MLA	Shi Yan,et al."Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 22.2(2015):128-134.